body {
    background-color: #fcfcfc;
    font-family: arial,sans-serif;
}

#hex2rgb {
    background-color: #fff;
    width: 450px;
    min-height: 400px;
    margin: 50px auto;
    box-shadow: 1px 1px 5px #ccc;
    color: #555;
    display: flex;
    flex-direction: column;
}

#hex2rgb h4 {
    text-align: center;
    padding-top: 20px;
    font-size: 20px;
}
form {
    margin: 30px 0;
}

form label {
  margin: 0 0 15px 15px;
  display: block;
}

form input {
    width: 90%;
    display: block;
    margin: 0 auto;
    height: 30px;
    padding: 5px;
    border: 1px solid #eee;
}

#convert {
    width: 93%;
    display: block;
    margin: 25px auto;
    height: 50px;
    padding: 10px 0;
    border-radius: 0;
    background-color: dodgerblue;
    font-size: 18px;
    color: #fff;
}